The Black group is alive with 6 points.
Beware in getting caught in double damezumari.
The main defence in this problem is to answer with
. Then a and b are miai.
The placement at is answered by
. If
at
, then Black still plays
.
Suprisingly, main defence I and main defence II are independent of each other. Black just plays accordingly and gets 6 points.
is answered by
.
captures and lives.